Tait TB9100 - Page 75

TB9100/P25 CG/P25 TAG Installation and Operation Manual Installation 75
© Tait Limited March 2014
Remote Connection
to the Console
System
When the console system is located at a distance from the base station or
gateway it may be inconvenient to use E&M signaling for the Tx Key and
Rx Call functions. In this case a 4-wire audio-only connection may be used;
the E&M connections are replaced by tone signaling.
The console system indicates Tx Key to the base station or gateway by using
a low level tone: typically 2175 Hz at 20 dB below the speech level. The
console system indicates Rx Call to the operators using a voice operated
switch.
MUX Connection to
the Console System
If the remote connection uses MUXes, the E&M signaling lines can be used
to control the operation of the MUXes.
TB9100/P25 CG
analog line connection
Console system
1
From RF Rx
To RF Tx
3
6
4
5
base station/gateway
analog line connection
TB9100/P25 CG
analog line connection
Console system
1
8
Tx key relay
From RF Rx
To RF Tx
Rx gate
contact
PTT relay
Rx call relay
current-
limiting
resistor
SS
4WS
4WR
SR
±10-50V
MUX MUX
SS
4WS
4WR
SR
Audio to
dispatcher
Audio from
dispatcher
±10-50V
±10-50V
±10-50V
base station/gateway
analog line connection